Documentation updates for utils.py
Documentation updates for utils.py

Reviewed-by: imsnah


grnet/snf-ganeti,mbakke/ganeti,onponomarev/ganeti,mbakke/ganeti,andir/ganeti,ganeti/ganeti,ganeti/ganeti,leshchevds/ganeti,bitemyapp/ganeti,leshchevds/ganeti,mbakke/ganeti,ganeti-github-testing/ganeti-test-1,ganeti/ganeti,apyrgio/ganeti,yiannist/ganeti,andir/ganeti,apyrgio/snf-ganeti,bitemyapp/ganeti,yiannist/ganeti,onponomarev/ganeti,grnet/snf-ganeti,andir/ganeti,yiannist/ganeti,apyrgio/snf-ganeti,apyrgio/ganeti,dimara/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,dimara/ganeti